Display device

ABSTRACT

A display device includes a first panel including a pad side area at one side of the first panel, a first optically transparent adhesive member on one surface of the first panel, a printed circuit board including a first attachment portion attached to the one surface of the first panel at the pad side area, a window on the first optically transparent adhesive member, a second optically transparent adhesive member on the other surface of the first panel, and a second panel on the second optically transparent adhesive member opposite the first panel, wherein the pad side area has a connection area at which the printed circuit board is attached to the first panel, and at which an edge of the first optically transparent adhesive member extends beyond an edge of the second optically transparent adhesive member, and a non-connection area at which the printed circuit board is not attached.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.15/848,611, filed Dec. 20, 2017, which claims priority to and thebenefit of Korean Patent Application No. 10-2017-0089891, filed Jul. 14,2017, the entire content of both of which is incorporated herein byreference.

BACKGROUND 1. Field

The present disclosure relates to a display device including a pluralityof adhesion members and an adhesive member for bonding them.

2. Description of the Related Art

A display device is a device for displaying an image, and includes adisplay panel, such as an organic light-emitting display panel or aliquid crystal display panel. The display device may include a windowfor protecting the display panel from an external impact. In particular,the window is widely applied to portable electronic devices, such assmart phones. Some portable electronic devices have a touch inputfunction. Such a display device may include a touch panel that performsa touch input function. The above-described window, touch panel, anddisplay panel may be attached to each other through an adhesive. Ifthere is a stepped space at an end portion between the window, the touchpanel, and the display panel that are attached to each other, thedisplay device may be vulnerable to an external impact, and it mayfurther be difficult to achieve and maintain flatness of the displaydevice.

SUMMARY

Aspects of the present disclosure provide a display device with improvedflatness.

An embodiment may be related a display device. The display deviceincludes a first panel including a pad side area at one side of thefirst panel, a first optically transparent adhesive member on onesurface of the first panel, a printed circuit board including a firstattachment portion attached to the one surface of the first panel at thepad side area, a window on the first optically transparent adhesivemember, a second optically transparent adhesive member on the othersurface of the first panel, and a second panel on the second opticallytransparent adhesive member opposite the first panel, wherein the padside area has a connection area at which the printed circuit board isattached to the first panel, and at which an edge of the first opticallytransparent adhesive member extends beyond an edge of the secondoptically transparent adhesive member in a plan view, and anon-connection area at which the printed circuit board is not attachedto the first panel.

The first optically transparent adhesive member partially may cover theprinted circuit board at the connection area.

The second optically transparent adhesive member might not overlap thefirst attachment portion of the printed circuit board at the connectionarea.

The first panel and the second panel may be separated from each other byan empty space at the connection area.

The edge of the first optically transparent adhesive member at theconnection area may protrude outwardly further than the edge of thefirst optically transparent adhesive member at the non-connection area.

The edge of the second optically transparent adhesive member at theconnection area may be more concavely recessed than the edge of thesecond optically transparent adhesive member at the non-connection area.

The connection area of the pad side area may protrude more outwardlythan the non-connection area.

The first optically transparent adhesive member may have a modulus thatis smaller than that of the second optically transparent adhesivemember.

The edge of the first optically transparent adhesive member and the edgeof the second optically transparent adhesive member may be aligned witheach other at the non-connection area.

The edge of the second optically transparent adhesive member may extendfurther than the edge of the first optically transparent adhesive memberat the non-connection area.

The connection area may include a plurality of separate portions, andeach of the separate portions of the connection area may be betweenadjacent portions of the non-connection area.

The printed circuit board may further include a second attachmentportion that is attached to the other surface of the first panel at thepad side area, and the second optically transparent adhesive membermight not overlap the second attachment portion.

An embodiment may be related a display device. The display deviceincludes a touch panel including a sensing unit, and having a pad sidearea on one side of the sensing unit, a first optically transparentadhesive member on one surface of the touch panel, a touch printedcircuit board including a first attachment portion attached to the onesurface of the touch panel at the pad side area, a window on the firstoptically transparent adhesive member, a second optically transparentadhesive member on the other surface of the touch panel, and a displaypanel on the second optically transparent adhesive member opposite thetouch panel, wherein the pad side area includes a connection area atwhich the touch printed circuit board is attached to the touch panel, atwhich the first optically transparent adhesive member partially coversthe touch printed circuit board, at which the second opticallytransparent adhesive member does not overlap the first attachmentportion of the touch printed circuit board, and at which and an edge ofthe first optically transparent adhesive member extends further than anedge of the second optically transparent adhesive member, and anon-connection area at which the touch printed circuit board is notattached to the touch panel.

The touch panel and the display panel may be separated from each otherby an empty space at the connection area, and the edge of the firstoptically transparent adhesive member and the edge of the secondoptically transparent adhesive member may be aligned with each other atthe non-connection area.

The display panel may include a display unit, and a driving unit at oneside of the display unit, wherein the sensing unit overlaps the displayunit, and wherein the pad side area overlaps the driving unit.

The display device may further include a display printed circuit boardattached to the driving unit of the display panel, a main circuit boardto which the touch printed circuit board and the display printed circuitboard are electrically connected, and a panel lower sheet attached to aback surface of the display unit of the display panel.

The display panel may include a flexible substrate that is bent in adirection opposite to a display surface at the driving unit.

The touch printed circuit board may further include a second attachmentportion attached to the other surface of the touch panel at the pad sidearea, and the second optically transparent adhesive member might notoverlap the second attachment portion.

An embodiment may be related a display device. The display deviceincludes a touch panel a touch printed circuit board attached to onesurface of the touch panel, a first optically transparent adhesivemember on the one surface of the touch panel, and a second opticallytransparent adhesive member on the other surface of the touch panel,wherein each of the touch panel, the first optically transparentadhesive member, and the second optically transparent adhesive memberincludes a side area in one direction, wherein the touch panel includesa first protrusion at the side area, wherein the touch printed circuitboard is attached at the first protrusion, wherein the first opticallytransparent adhesive member includes a second protrusion at the sidearea that partially overlaps the first protrusion in a plan view,wherein the first optically transparent adhesive member covers at leasta part of the touch printed circuit board, and wherein a edge of thesecond protrusion of the first optically transparent adhesive memberprotrudes more outwardly than a edge of the side area of the secondoptically transparent adhesive member.

The side area of the touch panel may include a connection area at whichthe touch printed circuit board is attached and including the firstprotrusion, and a non-connection area at which the touch printed circuitboard is not attached to the touch panel, wherein the edge of the secondoptically transparent adhesive member at the connection area is recessedmore concavely than the edge of the second optically transparentadhesive member at the non-connection area.

According to the display device of an embodiment, the first opticallytransparent adhesive member protruding convexly on the connection areamay cover the attachment portion of the touch printed circuit board tofill a space between the touch printed circuit board and the window.Accordingly, it is possible to prevent or reduce the likelihood of theattachment portion of the touch printed circuit board coming off, toprotect the display device from an external impact by reducing oreliminating a separation space between the window and the touch printedcircuit board, and to improve the flatness of the display device bysuppressing the movement of the window and the touch printed circuitboard.

Further, because the second optically transparent adhesive member thatis concavely recessed on the connection area exposes the other surfaceof the touch panel, a space suitable for an attachment process of thetouch printed circuit board can be secured. Also, even if an externalforce is received or wrinkles are generated by the attachment portion ofthe touch printed circuit board, it is possible to reduce or prevent theexternal force or wrinkles from being transmitted to the display panellocated therebelow.

The effects of the present disclosure are not limited to theabove-described effects, and other effects which are not describedherein will become apparent to those skilled in the art from thefollowing description.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects and features of the present disclosure willbecome more apparent by describing in detail exemplary embodimentsthereof with reference to the attached drawings, in which:

FIG. 1 is an exploded perspective view of a display device according toan embodiment;

FIG. 2 is a cross-sectional view taken along the line II-II′ of FIG. 1;

FIG. 3 is a layout diagram showing a planar arrangement relationshipbetween a touch panel and first and second optically transparentadhesive members;

FIG. 4 is a cross-sectional view taken along the line IV-IV′ of FIG. 3;

FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 3;

FIG. 6 is a plan layout diagram of a touch panel according to anembodiment;

FIG. 7 is a cross-sectional view of a touch panel according to anembodiment;

FIG. 8 is a cross-sectional view of a touch panel according to anotherembodiment;

FIG. 9 is a cross-sectional view of a touch panel according to stillanother embodiment;

FIG. 10 is a layout diagram showing a planar arrangement relationshipbetween a touch panel and first and second optically transparentadhesive members according to another embodiment;

FIG. 11 is a layout diagram showing a planar arrangement relationshipbetween a touch panel and first and second optically transparentadhesive members according to still another embodiment;

FIG. 12 is a cross-sectional view taken along the line XII-XII′ of FIG.11;

FIG. 13 is a cross-sectional view of a display device according to stillanother embodiment;

FIG. 14 is a perspective view of the touch panel, the first and secondoptically transparent adhesive members and the touch printed circuitboard of FIG. 13;

FIG. 15 is a cross-sectional view of the touch panel of FIG. 14; and

FIG. 16 is a cross-sectional view of a display device according to stillanother embodiment.

DETAILED DESCRIPTION

Features of the inventive concept and methods of accomplishing the samemay be understood more readily by reference to the following detaileddescription of embodiments and the accompanying drawings. Hereinafter,embodiments will be described in more detail with reference to theaccompanying drawings. The present invention, however, may be embodiedin various different forms, and should not be construed as being limitedto only the illustrated embodiments herein. Rather, these embodimentsare provided as examples so that this disclosure will be thorough andcomplete, and will fully convey the aspects and features of the presentinvention to those skilled in the art. Accordingly, processes, elements,and techniques that are not necessary to those having ordinary skill inthe art for a complete understanding of the aspects and features of thepresent invention may not be described. Unless otherwise noted, likereference numerals denote like elements throughout the attached drawingsand the written description, and thus, descriptions thereof will not berepeated. Further, parts not related to the description of theembodiments might not be shown to make the description clear. In thedrawings, the relative sizes of elements, layers, and regions may beexaggerated for clarity.

In the following description, for the purposes of explanation, numerousspecific details are set forth to provide a thorough understanding ofvarious embodiments. It is apparent, however, that various embodimentsmay be practiced without these specific details or with one or moreequivalent arrangements. In other instances, well-known structures anddevices are shown in block diagram form in order to avoid unnecessarilyobscuring various embodiments.

It will be understood that, although the terms “first,” “second,”“third,” etc., may be used herein to describe various elements,components, regions, layers and/or sections, these elements, components,regions, layers and/or sections should not be limited by these terms.These terms are used to distinguish one element, component, region,layer or section from another element, component, region, layer orsection. Thus, a first element, component, region, layer or sectiondescribed below could be termed a second element, component, region,layer or section, without departing from the spirit and scope of thepresent invention.

Spatially relative terms, such as “beneath,” “below,” “lower,” “under,”“above,” “upper,” and the like, may be used herein for ease ofexplanation to describe one element or feature's relationship to anotherelement(s) or feature(s) as illustrated in the figures. It will beunderstood that the spatially relative terms are intended to encompassdifferent orientations of the device in use or in operation, in additionto the orientation depicted in the figures. For example, if the devicein the figures is turned over, elements described as “below” or“beneath” or “under” other elements or features would then be oriented“above” the other elements or features. Thus, the example terms “below”and “under” can encompass both an orientation of above and below. Thedevice may be otherwise oriented (e.g., rotated 90 degrees or at otherorientations) and the spatially relative descriptors used herein shouldbe interpreted accordingly. Similarly, when a first part is described asbeing arranged “on” a second part, this indicates that the first part isarranged at an upper side or a lower side of the second part without thelimitation to the upper side thereof on the basis of the gravitydirection.

It will be understood that when an element, layer, region, or componentis referred to as being “on,” “connected to,” or “coupled to” anotherelement, layer, region, or component, it can be directly on, connectedto, or coupled to the other element, layer, region, or component, or oneor more intervening elements, layers, regions, or components may bepresent. However, “directly connected/directly coupled” refers to onecomponent directly connecting or coupling another component without anintermediate component. Meanwhile, other expressions describingrelationships between components such as “between,” “immediatelybetween” or “adjacent to” and “directly adjacent to” may be construedsimilarly. In addition, it will also be understood that when an elementor layer is referred to as being “between” two elements or layers, itcan be the only element or layer between the two elements or layers, orone or more intervening elements or layers may also be present.

For the purposes of this disclosure, expressions such as “at least oneof,” when preceding a list of elements, modify the entire list ofelements and do not modify the individual elements of the list. Forexample, “at least one of X, Y, and Z” and “at least one selected fromthe group consisting of X, Y, and Z” may be construed as X only, Y only,Z only, or any combination of two or more of X, Y, and Z, such as, forinstance, XYZ, XYY, YZ, and ZZ. Like numbers refer to like elementsthroughout. As used herein, the term “and/or” includes any and allcombinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the presentinvention. As used herein, the singular forms “a” and “an” are intendedto include the plural forms as well, unless the context clearlyindicates otherwise. It will be further understood that the terms“comprises,” “comprising,” “have,” “having,” “includes,” and“including,” when used in this specification, specify the presence ofthe stated features, integers, steps, operations, elements, and/orcomponents, but do not preclude the presence or addition of one or moreother features, integers, steps, operations, elements, components,and/or groups thereof. As used herein, the term “and/or” includes anyand all combinations of one or more of the associated listed items.

As used herein, the term “substantially,” “about,” “approximately,” andsimilar terms are used as terms of approximation and not as terms ofdegree, and are intended to account for the inherent deviations inmeasured or calculated values that would be recognized by those ofordinary skill in the art. “About” or “approximately,” as used herein,is inclusive of the stated value and means within an acceptable range ofdeviation for the particular value as determined by one of ordinaryskill in the art, considering the measurement in question and the errorassociated with measurement of the particular quantity (i.e., thelimitations of the measurement system). For example, “about” may meanwithin one or more standard deviations, or within ±30%, 20%, 10%, 5% ofthe stated value. Further, the use of “may” when describing embodimentsof the present invention refers to “one or more embodiments of thepresent invention.” As used herein, the terms “use,” “using,” and “used”may be considered synonymous with the terms “utilize,” “utilizing,” and“utilized,” respectively. Also, the term “exemplary” is intended torefer to an example or illustration.

When a certain embodiment may be implemented differently, a specificprocess order may be performed differently from the described order. Forexample, two consecutively described processes may be performedsubstantially at the same time or performed in an order opposite to thedescribed order.

Also, any numerical range disclosed and/or recited herein is intended toinclude all sub-ranges of the same numerical precision subsumed withinthe recited range. For example, a range of “1.0 to 10.0” is intended toinclude all subranges between (and including) the recited minimum valueof 1.0 and the recited maximum value of 10.0, that is, having a minimumvalue equal to or greater than 1.0 and a maximum value equal to or lessthan 10.0, such as, for example, 2.4 to 7.6. Any maximum numericallimitation recited herein is intended to include all lower numericallimitations subsumed therein, and any minimum numerical limitationrecited in this specification is intended to include all highernumerical limitations subsumed therein. Accordingly, Applicant reservesthe right to amend this specification, including the claims, toexpressly recite any sub-range subsumed within the ranges expresslyrecited herein. All such ranges are intended to be inherently describedin this specification such that amending to expressly recite any suchsubranges would comply with the requirements of 35 U.S.C. § 112(a) and35 U.S.C. § 132(a).

Various embodiments are described herein with reference to sectionalillustrations that are schematic illustrations of embodiments and/orintermediate structures. As such, variations from the shapes of theillustrations as a result, for example, of manufacturing techniquesand/or tolerances, are to be expected. Further, specific structural orfunctional descriptions disclosed herein are merely illustrative for thepurpose of describing embodiments according to the concept of thepresent disclosure. Thus, embodiments disclosed herein should not beconstrued as limited to the particular illustrated shapes of regions,but are to include deviations in shapes that result from, for instance,manufacturing. For example, an implanted region illustrated as arectangle will, typically, have rounded or curved features and/or agradient of implant concentration at its edges rather than a binarychange from implanted to non-implanted region. Likewise, a buried regionformed by implantation may result in some implantation in the regionbetween the buried region and the surface through which the implantationtakes place. Thus, the regions illustrated in the drawings are schematicin nature and their shapes are not intended to illustrate the actualshape of a region of a device and are not intended to be limiting.Additionally, as those skilled in the art would realize, the describedembodiments may be modified in various different ways, all withoutdeparting from the spirit or scope of the present disclosure.

The electronic or electric devices and/or any other relevant devices orcomponents according to embodiments of the present invention describedherein may be implemented utilizing any suitable hardware, firmware(e.g. an application-specific integrated circuit), software, or acombination of software, firmware, and hardware. For example, thevarious components of these devices may be formed on one integratedcircuit (IC) chip or on separate IC chips. Further, the variouscomponents of these devices may be implemented on a flexible printedcircuit film, a tape carrier package (TCP), a printed circuit board(PCB), or formed on one substrate. Further, the various components ofthese devices may be a process or thread, running on one or moreprocessors, in one or more computing devices, executing computer programinstructions and interacting with other system components for performingthe various functionalities described herein. The computer programinstructions are stored in a memory which may be implemented in acomputing device using a standard memory device, such as, for example, arandom access memory (RAM). The computer program instructions may alsobe stored in other non-transitory computer readable media such as, forexample, a CD-ROM, flash drive, or the like. Also, a person of skill inthe art should recognize that the functionality of various computingdevices may be combined or integrated into a single computing device, orthe functionality of a particular computing device may be distributedacross one or more other computing devices without departing from thespirit and scope of the exemplary embodiments of the present invention.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which the present invention belongs. Itwill be further understood that terms, such as those defined in commonlyused dictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art and/orthe present specification, and should not be interpreted in an idealizedor overly formal sense, unless expressly so defined herein.

A display device according to an embodiment includes a plurality ofadhesion members, and an adhesive member for bonding the adhesionmembers. The plurality of adhesion members may include a panel and/or awindow. The panel may include a display panel, a touch panel and thelike. The adhesive member may be optically transparent.

FIG. 1 is an exploded perspective view of a display device according toan embodiment. FIG. 2 is a cross-sectional view taken along the lineII-II′ of FIG. 1. FIG. 3 is a layout diagram showing a planararrangement relationship between a touch panel and first and secondoptically transparent adhesive members. FIG. 4 is a cross-sectional viewtaken along the line IV-IV′ of FIG. 3. FIG. 5 is a cross-sectional viewtaken along the line V-V of FIG. 3.

Referring to FIGS. 1 to 5, a display device 100 includes a display panel50, a touch panel 30, a window 10, a first optically transparentadhesive member 20, and a second optically transparent adhesive member40.

The display panel 50 is a panel for displaying an image by an input datasignal. A panel such as an organic light-emitting display panel, aliquid crystal display panel, a plasma display panel, and anelectrophoretic display panel may be used as the display panel 50. Inthe illustrated embodiment, an organic light-emitting display panel isused as the display panel 50.

The display panel 50 may include a display unit DAR and a driving unitDDR.

The display unit DAR includes a plurality of pixels. Each pixel mayinclude a light-emitting layer 53, and a circuit layer 52 forcontrolling the amount of light emitted from the light-emitting layer53. The circuit layer 52 may include a display wiring, a displayelectrode, and at least one transistor. The light-emitting layer 53 mayinclude an organic light-emitting material. The light-emitting layer 53may be sealed by a sealing film 54. The sealing film 54 may seal thelight-emitting layer 53 to reduce or prevent moisture and the like frombeing introduced into the sealing film 54 from the outside. The sealingfilm 54 may be a single or multilayer film of an inorganic film, or maybe a laminated film in which an inorganic film and an organic film arealternately laminated.

The display unit DAR may have a rectangular shape, or may have arectangular shape with rounded corners. However, the present disclosureis not limited thereto, and the display unit DAR may have variousshapes, such as a square, other polygons, a circle, an ellipse, or thelike.

The driving unit DDR is in the periphery of the display unit DAR, forexample, on one side of the display unit DAR. The driving unit DDR maybe a non-display unit that does not display an image. Unlike the displayunit DAR, the driving unit DDR may include no pixels. When the displayunit DAR has a rectangular shape with rounded corners, the driving unitDDR is adjacent to at least one side of the rectangular shape of thedisplay unit DAR. In the figure, it is illustrated that the driving unitDDR is adjacent to one end side of the display unit DAR. The drivingunit DDR may include a driving wiring 56 connected to the display wiringof the pixel and a driving wiring pad 57 of the driving wiring 56. Anexternal component, such as a driving chip or a printed circuit board,may be mounted on the driving wiring pad 57, as will be described later.

In one embodiment, the display panel 50 may include a flexible substrate51. The substrate 51 may be formed to include, for example, a flexibleplastic material such as polyimide. The circuit layer 52 and thelight-emitting layer 53 of the display unit DAR may be on one surface ofthe substrate 51. When the substrate 51 has flexible characteristics,the substrate 51 may be bent at the driving unit DDR. For example, thesubstrate 51 of the driving unit DDR adjacent to the short side of thedisplay unit DAR may be bent in a direction opposite to the displaysurface, and may extend toward the back surface of the display unit DAR.The bent driving unit DDR may partially overlap the display unit DAR.One surface of the substrate 51 in an overlapping area and one surfaceof the substrate 51 of the display unit DAR may be oriented in oppositedirections. That is, one surface of the substrate 51 of the display unitDAR may face upward, while one surface of the bent substrate 51 in theoverlapping area may face downward.

The driving wiring 56 of the driving unit DDR may extend along thebending area, and the driving wiring pad 57 may be at the overlappingarea of the display unit DAR and the bent driving unit DDR.

The driving unit DDR of the display panel 50 may include a protectivefilm 55. The protective film 55 covers and protects the driving wiring56. Furthermore, the protective film 55 may serve to enhance therigidity of the flexible substrate 51, or to alleviate stress in thebending area. The protective film 55 exposes a portion of the drivingwiring pad 57.

In one embodiment, the protective film 55 may include an organic coatinglayer, such as polyimide, acrylate, epoxy and the like. In anotherembodiment, the protective film 55 may be attached in the form of aprotective film.

The driving wiring pad 57 of the driving unit DDR of the display panel50 may be electrically connected to a display printed circuit board 80.For example, the driving wiring pad 57 may be on one surface of thesubstrate 51, and the display printed circuit board 80 may be mounted onthe driving wiring pad 57 through an anisotropic conductive film (ACF)or the like. The display printed circuit board 80 may be a film typeflexible printed circuit board. A driving chip may be mounted on thedisplay printed circuit board 80. The display printed circuit board 80may be formed of a chip on film, a tape carrier package, or the like.

The display printed circuit board 80 may be electrically connected to amain circuit board 90. The main circuit board 90 may be a rigid printedcircuit board. The main circuit board 90 and the display printed circuitboard 80 may be attached to each other via an anisotropic conductivefilm (ACF) or the like.

The touch panel 30 is on the top of the display panel 50. The touchpanel 30 may acquire position information of an input point by, forexample, a capacitive method, a resistive method, an electromagneticinduction method, an infrared method, or the like. In this embodiment, acapacitive touch panel 30 is exemplified, but the present disclosure isnot limited thereto.

The touch panel 30 may overlap the display unit DAR of the display panel50, and may partially overlap the driving unit DDR. The touch panel 30might not overlap a portion where the substrate 51 of the display panel50 begins to be bent.

The touch panel 30 may include a touch electrode and/or a touch wiring.The touch panel 30 will be described in detail with reference to FIGS. 6and 7.

FIG. 6 is a plan layout diagram of a touch panel according to anembodiment. FIG. 7 is a cross-sectional view of a touch panel accordingto an embodiment.

Referring to FIGS. 6 and 7, the touch panel 30 includes a sensing unitTAR and a pad side area TDR. When the touch panel 30 has a rectangularshape in plan view, the touch panel 30 may include four side portionsadjacent to the respective sides. The pad side area TDR may be locatedon one side adjacent to one end side of the touch panel 30 in plan view.The pad side area TDR may be on one side with respect to the sensingunit TAR. The sensing unit TAR of the touch panel 30 may be located tooverlap the display unit DAR of the display panel 50. The pad side areaTDR of the touch panel 30 is located to overlap the driving unit DDR ofthe display panel 50.

The sensing unit TAR of the touch panel 30 includes a substrate 310, afirst wiring layer 320 on one surface of the substrate 310, a firstinsulating layer 330 on the first wiring layer 320, a second wiringlayer 340 on the first insulating layer 330, and a second insulatinglayer 350 on the second wiring layer 340.

The substrate 310 may be made of glass or plastic such as polyethyleneterephthalate (PET), polyimide (PI), polycarbonate (PC), polyethylene(PE), polypropylene (PP), polysulfone (PSF), polymethylmethacrylate(PMMA), triacetylcellulose (TAC), and/or cycloolefin polymer (COP).

The first wiring layer 320 is on one surface of the substrate 310. Thefirst wiring layer 320 includes a plurality of first touch electrodes321 and a plurality of second touch electrodes 322. The first touchelectrodes 321 and the second touch electrodes 322 may acquire positioninformation of a point touched by a self-capacitance method and/or amutual capacitance method.

The first touch electrodes 321 and the second touch electrodes 322 maybe arranged in a matrix. The first touch electrodes 321 and the secondtouch electrodes 322 may be rhombic, but are not limited thereto. Thefirst touch electrodes 321 may be electrically connected along a columndirection (long side direction), and the second touch electrodes 322 maybe electrically connected along a row direction (short side direction).However, the present disclosure is not limited thereto, and the firsttouch electrodes 321 may be electrically connected along the rowdirection and the second touch electrodes 322 may be electricallyconnected along the column direction. The first touch electrodes 321 andthe second touch electrodes 322 are insulated from each other, and areseparated from each other.

The first wiring layer 320 includes a first connection wiring 323connecting the first touch electrodes 321. Respective ones of the firsttouch electrodes 321 that are adjacent in the column direction arephysically connected through the first connection wiring 323. The widthof the first connection wiring 323 may be smaller than the width of thefirst touch electrodes 321.

The second touch electrodes 322 adjacent in the row direction in thefirst wiring layer 320 are physically separated.

The first wiring layer 320 may include a touch driving wiring 324 and atouch wiring pad TP. The touch driving wiring 324 is connected to thefirst touch electrodes 321 or to the second touch electrodes 322, andextends toward the pad side area TDR to form, or to connect to, thetouch wiring pad TP at the pad side area TDR. The touch wiring pad TPmay have a slightly more extended shape than the touch driving wiring324 for connection with a touch printed circuit board 70, but is notlimited thereto.

The first wiring layer 320 may be formed of a conductive material. Forexample, the first wiring layer 320 may be formed to include atransparent conductive oxide, such as indium tin oxide (ITO), indiumzinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), ametal material such as molybdenum, silver, titanium, copper, aluminum,or an alloy thereof, a conductive polymer such as PEDOT, metalnanowires, carbon nanotubes, graphene, and/or the like. When the firstwiring layer 320 includes an opaque material, the first touch electrodes321 and the second touch electrodes 322 may be formed in a mesh shape.

The first insulating layer 330 is on the first wiring layer 320. Thefirst insulating layer 330 may be over substantially the entire surfaceof the substrate 310. The first insulating layer 330 may include contactholes 331 exposing the second touch electrodes 322.

The second wiring layer 340 is on the first insulating layer 330. Thesecond wiring layer 340 includes a second connection wiring. The secondconnection wiring of the second wiring layer 340 electrically connectsthe neighboring second touch electrodes 322. The width of the secondconnection wiring of the second wiring layer 340 may be smaller than thewidth of the second touch electrodes 322. The second connection wiringof the second wiring layer 340 is electrically connected to the secondtouch electrodes 322 through the contact holes 331. Although it isillustrated that the neighboring second touch electrodes 322 areconnected through one second connection wiring, they may be connected bya plurality of second connection wirings.

The second wiring layer 340 may be formed to include materialsexemplified for the first wiring layer 320 described above. In oneembodiment, the first wiring layer 320 including the first touchelectrodes 321 and the second touch electrodes 322 having a relativelylarge area may be made of a transparent conductive oxide, and the secondwiring layer 340 including the second connection wiring may be made of ametal material having a relatively low resistance such as molybdenum,silver, titanium, copper, aluminum, or an alloy thereof.

The second insulating layer 350 is on the second wiring layer 340. Thesecond insulating layer 350 covers and protects the second wiring layer340. The second insulating layer 350 may be over the entire surface ofthe substrate 310.

Each of the first insulating layer 330 and the second insulating layer350 may have a single layer or a multilayer structure. Further, each ofthe first insulating layer 330 and the second insulating layer 350 mayinclude an inorganic material, an organic material, or a compositematerial. In one embodiment, at least one of the first insulating layer330 and the second insulating layer 350 may include an inorganic film.The inorganic film may include at least one of aluminum oxide, titaniumoxide, silicon oxide, silicon oxynitride, zirconium oxide, and/orhafnium oxide.

In another embodiment, at least one of the first insulating layer 330and the second insulating layer 350 may include an organic film. Theorganic film may include at least one of acrylic resin, methacrylicresin, polyisoprene, vinyl resin, epoxy resin, urethane resin, celluloseresin, siloxane resin, polyimide resin, polyamide resin and/or peryleneresin.

The touch wiring pad TP may be exposed without being covered by thefirst insulating layer 330 and the second insulating layer 350. Thetouch printed circuit board 70 may be electrically connected to theexposed touch wiring pad TP. The touch printed circuit board 70 may be aflexible printed circuit board. An attachment portion CB located at oneend of the touch printed circuit board 70 may be attached to the touchwiring pad TP of the touch panel 30 through an anisotropic conductivefilm ACF or the like. The touch printed circuit board 70 may be bent soas to externally surround the bent portion of the substrate 51 of thedisplay panel 50 (e.g., on an outside edge) as shown in FIG. 2. Theother end of the touch printed circuit board 70 may be electricallyconnected to the main circuit board 90.

FIGS. 8 and 9 show modification examples of the touch panel describedabove.

FIG. 8 is a cross-sectional view of a touch panel according to anotherembodiment. Referring to FIG. 8, a touch panel 30_1 according to thepresent embodiment is different from the embodiment of FIG. 7 in that afirst insulating layer 330_1 is not over the entire surface of thesubstrate 310. That is, the first insulating layer 330_1 is in an islandshape at a portion where a second connection electrode of the secondwiring layer 340 is formed. The first connection wiring 323 (see alsoFIG. 6) and the second connection electrode of the second wiring layer340 are insulated from each other by the first insulating layer 330_1.

FIG. 9 is a cross-sectional view of a touch panel according to stillanother embodiment. A touch panel 30_2 according to the embodiment ofFIG. 9 may be configured such that the stacking order of the substrate310, the first wiring layer 320, the first insulating layer 330, thesecond wiring layer 340 and the second insulating layer 350 is oppositeto that of the embodiment of FIG. 7.

Referring again to FIGS. 1 to 5, the window 10 is above the touch panel30. The window 10 serves to cover and protect the touch panel 30 and/orthe display panel 50. The window 10 completely overlaps the touch panel30. The window 10 may be larger than the touch panel 30, and its edgemay protrude from (e.g., extend beyond) each edge of the touch panel 30.Further, the window 10 may completely overlap the driving unit DDR aswell as the display unit DAR of the display panel 50. The window 10 maybe larger than the display panel 50, and its edge may protrude from(e.g., extend beyond) each edge of the display panel 50. The window 10may cover up to the bent portion of the substrate 51 of the displaypanel 50.

The window 10 may be made of a transparent material. The window 10 mayinclude, for example, glass or plastic. When the window 10 includesplastic, the window 10 may have a flexible property.

Examples of plastics applicable to the window 10 include, but are notlimited to, polyimide, polyacrylate, polymethylmethacrylate (PMMA),polycarbonate, (PC), polyethylene naphthalate (PEN), polyvinylidenechloride, polyvinylidene difluoride (PVDF), polystyrene, ethylenevinylalcohol copolymer, polyethersulphone (PES), polyetherimide (PEI),polyphenylene sulfide (PPS), polyallylate, triacetyl cellulose (TAC),and/or cellulose acetate propionate (CAP). The plastic window 10 may beformed to include one or more of the plastic materials listed above.

When the window 10 includes plastic, it may further include a coatinglayer on the upper and lower surfaces of the plastic. In one embodiment,the coating layer may be a hard coating layer including an organic layerand/or an organic-inorganic hybrid layer including an acrylate compoundand the like. The organic layer may include an acrylate compound. Theorganic-inorganic hybrid layer may be a layer in which an inorganicmaterial such as silicon oxide, zirconium oxide, aluminum oxide,tantalum oxide, niobium oxide, and/or glass beads is dispersed in anorganic material such as an acrylate compound. In another embodiment,the coating layer may include a metal oxide layer. The metal oxide layermay include, but is not limited to, a metal oxide such as titanium,aluminum, molybdenum, tantalum, copper, indium, tin and tungsten.

The first optically transparent adhesive member 20 is between the window10 and the touch panel 30. The window 10 and the touch panel 30 may becoupled to each other by the first optically transparent adhesive member20. The second optically transparent adhesive member 40 is between thetouch panel 30 and the display panel 50. The touch panel 30 and thedisplay panel 50 may be coupled to each other by the second opticallytransparent adhesive member 40.

Each of the first optically transparent adhesive member 20 and thesecond optically transparent adhesive member 40 may be made of anoptically transparent adhesive film, an optically transparent adhesivetape, an optically transparent resin or the like.

Although the first optically transparent adhesive member 20 and thesecond optically transparent adhesive member 40 may be made of the samematerial, their properties may be different. For example, the firstoptically transparent adhesive member 20 may have a modulus that issmaller than that of the second optically transparent adhesive member40.

The first optically transparent adhesive member 20 may be thinner thanthe second optically transparent adhesive member 40. For example, thethickness of the first optically transparent adhesive member 20 may beabout 0.1 mm, and the thickness of the second optically transparentadhesive member 40 may be about 0.15 mm. However, a thicknessrelationship between the first optically transparent adhesive member 20and the second optically transparent adhesive member 40 is not limitedto the above example.

The first optically transparent adhesive member 20 and the secondoptically transparent adhesive member 40 have substantially similarshapes and sizes, but all edges thereof are not necessarily aligned witheach other. That is, the first optically transparent adhesive member 20and the second optically transparent adhesive member 40 may include anon-overlapping area in plan view. A detailed description thereof willbe given later.

The display device 100 may further include a panel lower sheet 60. Thepanel lower sheet 60 may be attached to the back surface of the displayunit DAR of the display panel 50. The panel lower sheet 60 includes atleast one functional layer. The functional layer may be a layer thatperforms a heat dissipation function, an electromagnetic shieldingfunction, a grounding function, a buffering function, a rigidityenhancing function, a supporting function, and/or a digitizing function.The functional layer may be a sheet layer, a film layer, a thin layer, acoating layer, a panel, a plate, or the like. One functional layer maybe formed of a single layer, but may also be formed of a plurality oflaminated thin films or coating layers. The functional layer may be, forexample, a supporting substrate, a heat dissipation layer, anelectromagnetic shielding layer, an impact absorbing layer, a digitizer,or the like.

The bent substrate 51 of the driving unit DDR of the display panel 50and the display printed circuit board 80 and the main circuit board 90connected thereto may be located below the panel lower sheet 60. Thebent touch printed circuit board 70 may also be located below the panellower sheet 60.

The lower surface of the panel lower sheet 60 may be bonded to the othersurface of the bent substrate 51 and/or to the main circuit board 90through an adhesive layer, but is not limited thereto.

Hereinafter, a positional relationship between the touch panel 30, thefirst optically transparent adhesive member 20, and the second opticallytransparent adhesive member 40 will be described in more detail.

The planar shape of the touch panel 30 may substantially correspond tothe planar shape of the display unit DAR of the display panel 50, asshown in FIGS. 1 and 3. When the display unit DAR of the display panel50 has a rectangular shape with rounded corners, the plane shape of thetouch panel 30 may also have a substantially rectangular shape withrounded corners. However, the edge of a pad side area TDR, which is ofthe edge of the touch panel 30, might not have a straight line shape inplan view. For example, a planar profile of the pad side area TDR of thetouch panel 30 may include a baseline, and a protrusion that protrudesoutward from the baseline.

For example, the pad side area TDR of the touch panel 30 may include aconnection area CNA at which the touch printed circuit board 70 isattached (e.g., to the touch panel 30), and a non-connection area NCA towhich the touch printed circuit board 70 is not attached. A plurality oftouch wiring pads TP are in the connection area CNA. In the presentembodiment, the touch wiring pad TP is not located in the non-connectionarea NCA. In another embodiment, a dummy pad may be located in thenon-connection area NCA, although the touch printed circuit board 70 isnot directly attached thereto. The connection area CNA protrudes fromthe non-connection area NCA, thereby facilitating the attachment of thetouch printed circuit board 70. At least a part of the touch wiring padsTP of the connection area CNA may be located on the outer side withrespect to a side end portion in the non-connection area NCA. One end ofan attachment portion CB of the touch printed circuit board 70 may bealigned with the side end portion of the non-connection area NCA, or maybe located on the outer side thereof.

The remaining edges of the touch panel 30 (excluding the edge of the padside area TDR) may have a substantially straight line shape in planview. The remaining edges of the touch panel 30, other than the edge ofthe pad side area TDR may be aligned with the edges of the display panel50, but are not limited thereto. The edge(s) of the display panel 50 mayprotrude more than the edge(s) of the touch panel 30, or the edge(s) ofthe touch panel 30 may protrude more than the edge(s) of the displaypanel 50.

The first optically transparent adhesive member 20 is on one surface ofthe touch panel 30, and the second optically transparent adhesive member40 is on the other surface of the touch panel 30. The first opticallytransparent adhesive member 20 and the second optically transparentadhesive member 40 generally have a planar shape similar to that of thetouch panel 30.

The edges of the first optically transparent adhesive member 20 and thesecond optically transparent adhesive member 40 may be located moreinwardly than the edge of the touch panel 30. In other words, the edgeof the touch panel 30 at a corresponding portion may protrude outwardlyfrom the edge of the first optically transparent adhesive member 20 andfrom the edge of the second optically transparent adhesive member 40.

Thus, the edge of one surface of the touch panel 30 might not be coveredby the first optically transparent adhesive member 20, and the edge ofthe other surface of the touch panel 30 might not be covered by thesecond optically transparent adhesive member 40. In this case where thefirst and second optically transparent adhesive members 20 and 40 arenot completely formed up to the edge of the touch panel 30, the overflowof the adhesive material can be avoided in advance.

In the remaining side areas of the touch panel 30, except the pad sidearea TDR, the edges of the first optically transparent adhesive member20 and the second optically transparent adhesive member 40 may have astraight line shape that is parallel to the respective edges of thetouch panel 30. The first optically transparent adhesive member 20 andthe second optically transparent adhesive member 40 may be the sameplanar shape in the side areas not including the pad side area TDR ofthe touch panel 30. The edges of the first optically transparentadhesive member 20 and the second optically transparent adhesive member40 may be aligned with each other without protruding at the side areasnot including the pad side area TDR.

Meanwhile, in the pad side area TDR of the touch panel 30, the firstoptically transparent adhesive member 20 may partially protrudeoutwardly from, or may extend further than, or may extend beyond, thesecond optically transparent adhesive member 40. At the non-connectionarea NCA of the touch panel 30, the edge of the first opticallytransparent adhesive member 20 and the edge of the second opticallytransparent adhesive member 40 (e.g., the side surfaces of the first andsecond optically transparent adhesive members 20 and 40 located at areasother than the pad side area TDR of the touch panel 30) are aligned witheach other. On the other hand, at the connection area CNA of the touchpanel 30, the edge of the touch panel 30 protrudes outwardly. Near theconnection area CNA, the edge of the first optically transparentadhesive member 20 protrudes outwardly from the non-connection area NCA,while the edge of the second optically transparent adhesive member 40 isrecessed inwardly. That is, the edge of the second optically transparentadhesive member 40 is recessed inwardly on the connection area CNA ofthe touch panel 30. Therefore, the edge of the first opticallytransparent adhesive member 20 protrudes outwardly from the edge of thesecond optically transparent adhesive member 40 on the connection areaCNA such that the first optically transparent adhesive member 20 extendsfurther toward the touch wiring pad TP than the second opticallytransparent adhesive member 40.

As shown in FIG. 2, the first optically transparent adhesive member 20,which protrudes convexly on the connection area CNA, may partially coverone surface of the touch printed circuit board 70 attached to the touchpanel 30. The first optically transparent adhesive member 20 may be incontact with one surface of the touch printed circuit board 70.Therefore, it is possible to fill a space between the touch printedcircuit board 70 and the window 10, and one surface of the touch printedcircuit board 70 can be attached and fixed by the first opticallytransparent adhesive member 20. The attachment portion CB of the touchprinted circuit board 70 may detach due to a tension caused by bendingafter the touch printed circuit board 70 is attached. The firstoptically transparent adhesive member 20 is located up to the attachmentportion CB of the touch printed circuit board 70, thereby preventing orreducing the likelihood that the attachment portion CB will detach.Further, the display device 100 can be protected from an external impactby eliminating or reducing a separation space between the window 10 andthe touch printed circuit board 70, and the flatness of the displaydevice 100 can be improved by suppressing the movement of the window 10and the touch printed circuit board 70.

As shown in FIG. 2, the second optically transparent adhesive member 40,which is recessed concavely at or near the connection area can, mightnot overlap the attachment portion CB of the touch printed circuit board70 attached to the touch panel 30. In other words, the other surface ofthe touch panel 30 in the connection area CNA of the touch printedcircuit board 70 may be exposed without being covered by the secondoptically transparent adhesive member 40. The other surface of the touchpanel 30 on the connection area CNA of the touch printed circuit board70 may be separated from the display panel 50 located therebelow, anthere may be an empty space therebetween. Therefore, a space suitablefor an attachment process of the touch printed circuit board 70 can besecured. Even if an external force is received, or even if wrinkles aregenerated by the attachment portion CB of the touch printed circuitboard 70, because the touch printed circuit board 70 is not directlycoupled with the display panel 50 located therebelow, it is possible toreduce or prevent a deformation force, such as an external force orwrinkles, from being transmitted to the display panel 50.

Meanwhile, on the non-connection area NCA, the first opticallytransparent adhesive member 20 and the second optically transparentadhesive member 40 sufficiently protrude (e.g., up to a margin space toprevent or reduce the likelihood of the overflow of the adhesivematerial). Accordingly, a stepped space can be reduced or minimized todisperse an external impact, and the flatness of the display device 100can be improved.

In the above embodiment, the case where the second optically transparentadhesive member 40 is concavely recessed from the connection area CNAhas been exemplified. However, if a space suitable for an attachmentprocess of the touch printed circuit board 70 can be secured in thenon-connection area NCA, the second optically transparent adhesivemember 40 does not necessarily have to be recessed. That is, the edge ofthe second optically transparent adhesive member 40 may form a straightline without being differently protruded or recessed with respect to thenon-connection area NCA and the connection area CNA, or may protrudefurther toward or into the connection area CNA. However, in such anembodiment, the second optically transparent adhesive member 40 may belocated relatively inward with respect to the edge of the firstoptically transparent adhesive member 20.

Hereinafter, other embodiments will be described.

FIG. 10 is a layout diagram showing a planar arrangement relationshipbetween a touch panel and first and second optically transparentadhesive members according to another embodiment.

Referring to FIG. 10, a touch panel 30_3 according to the presentembodiment differs from the embodiment of FIG. 3 in that it includes aplurality of connection areas CNA.

For example, the pad side area TDR of the touch panel 30_3 includes aplurality of connection areas CNA. A non-connection area NCA is between,or separates, the connection areas CNA. The connection areas CNA and thenon-connection areas NCA may be alternately arranged. Each connectionarea CNA protrudes more than each non-connection area NCA. An attachmentportion CB of a touch printed circuit board 70_1 is formed to correspondto each connection area CNA. For example, when the connection area CNAis divided into three parts, the attachment part CB of the touch printedcircuit board 70_1 may be divided into three corresponding parts.

Also in the case of the present embodiment, the edge of the firstoptically transparent adhesive member 20_1 protrudes convexly on theconnection area CNA while the edge of the second optically transparentadhesive member 40_1 is recessed concavely on, or from, the connectionarea CNA. The edge of the first optically transparent adhesive member20_1 and the edge of the second optically transparent adhesive member40_1 are aligned on the non-connection area NCA between the connectionareas CNA. A relative positional relationship between the edge of thefirst optically transparent adhesive member 20_1 and the edge of thesecond optically transparent adhesive member 40_1 in a plan viewincludes repeated protrusions and alignments. That is, a region wherethe first optically transparent adhesive member 20_1 protrudes furtherthan the second optically transparent adhesive member 40_1, and a regionwhere the first optically transparent adhesive member 20_1 and thesecond optically transparent adhesive member 40_1 are aligned, arealternately arranged.

Therefore, the space suitable for the attachment process of the touchprinted circuit board 70_1 can be ensured while suppressing the movementof the touch printed circuit board 70_1 and while improving theflatness. It is also possible to reduce or prevent wrinkles or otherdeformation force from being transmitted toward the display panel 50 ofthe back surface of the attachment portion CB.

FIG. 11 is a layout diagram showing a planar arrangement relationshipbetween a touch panel and first and second optically transparentadhesive members according to still another embodiment. FIG. 12 is across-sectional view taken along the line XII-XII′ of FIG. 11.

Referring to FIGS. 11 and 12, the present embodiment differs from theembodiment of FIG. 10 with respect to the positional relationshipbetween the edge of a first optically transparent adhesive member 20_2and the edge of a second optically transparent adhesive member 40_2.

For example, the present embodiment is similar to the embodiment of FIG.10 in that the edge of the first optically transparent adhesive member20_2 protrudes from, or extends further than, the edge of the secondoptically transparent adhesive member 40_2 on the connection area CNA ofthe pad side area TDR of a touch panel 30_3. However, on thenon-connection area NCA, the edge of the second optically transparentadhesive member 40_2 protrudes more than the edge of the first opticallytransparent adhesive member 20_2 (e.g., extends outwardly further thanthe side of the first optically transparent adhesive member 20_2). Arelative positional relationship between the edge of the first opticallytransparent adhesive member 20_2 and the edge of the second opticallytransparent adhesive member 40_2 in plan view includes repeatedprotrusions and recessions. That is, a region where the first opticallytransparent adhesive member 20_2 protrudes further, and a region wherethe second optically transparent adhesive member 40_2 protrudes further,are alternately arranged.

In the case of the present embodiment, because the second opticallytransparent adhesive member 40_2 is relatively further protruded on thenon-connection area NCA, the bonding force with the display panel 50therebelow is increased. Accordingly, the space suitable for theattachment process of the touch printed circuit board 70_1 can beensured while improving the flatness of the display device 100. It isalso possible to reduce or prevent wrinkles or other deformation forcefrom being transmitted toward the display panel 50 of the back surfaceof the attachment portion CB.

FIG. 13 is a cross-sectional view of a display device according to stillanother embodiment. FIG. 14 is a perspective view of the touch panel,the first and second optically transparent adhesive members, and thetouch printed circuit board. FIG. 15 is a cross-sectional view of thetouch panel of FIG. 14.

Referring to FIGS. 13 to 15, a display device 100_1 according to thepresent embodiment differs from the embodiment of FIGS. 1 to 5 in that atouch printed circuit board 70_2 is attached not only to one surface,but is also attached to the other surface of a touch panel 30_4. Thisattachment can be achieved when the touch wiring pads TP of the touchpanel 30_4 are formed on both the one surface and the other surface. Anexemplary structure of the touch panel 30_4 is shown in FIG. 15.

Referring to FIG. 15, the touch panel 30_4 may include a substrate 310,a first wiring layer 325 on one surface of the substrate 310, a firstinsulating layer 335 covering the first wiring layer 325, a secondwiring layer 345 on the other surface of the substrate 310 and a secondinsulating layer 355 covering the second wiring layer 345.

The first wiring layer 325 and the second wiring layer 345 are insulatedfrom each other by the substrate 310. The first wiring layer 325includes a first touch wiring. The second wiring layer 345 includes asecond touch wiring. The first touch wiring may extend in the columndirection (long side direction) and the second touch wiring may extendin the row direction (short side direction), or vice versa, although thepresent disclosure is not limited thereto. A region where the firsttouch wiring and the second touch wiring cross each other becomes atouch electrode region.

The first wiring layer 320 further includes a first touch wiring padconnected to the first touch wiring, and the second wiring layer 340further includes a second touch wiring pad TP connected to the secondtouch wiring. The first touch wiring pad and the second touch wiring padare located at the pad side area TDR of the touch panel 30_4 as shown inFIGS. 13 and 14, respectively.

The touch printed circuit board 70_2 includes a first attachment portionCB1 attached to the first touch wiring pad and a second attachmentportion CB2 attached to the second touch wiring pad. The firstattachment portion CB1 and the second attachment portion CB2 may beconnected and integrated. The end of the first attachment portion CB1and the end of the second attachment portion CB2 may be aligned on thetouch panel 30_4, but the present disclosure is not limited thereto.

This embodiment is also similar to the embodiment of FIG. 2 in that theedge of the first optically transparent adhesive member 20 convexlyprotrudes on the connection area CNA while the edge of the secondoptically transparent adhesive member 40 is concavely recessed on theconnection area CNA, and the edge of the first optically transparentadhesive member 20 and the edge of the second optically transparentadhesive member 40 are aligned at the non-connection area NCA betweenthe connection areas CNA. A relative positional relationship between theedge of the first optically transparent adhesive member 20 and the edgeof the second optically transparent adhesive member 40 in plan viewincludes repeated protrusions and alignments.

On the connection area CNA, the first optically transparent adhesivemember 20 partially overlaps the first attachment portion CB1 of thetouch printed circuit board 70_2. That is, similarly to the embodimentof FIG. 2, the first optically transparent adhesive member 20 maypartially cover one surface of the first attachment portion CB1 of thetouch printed circuit board 70_2, and may fix it to the window 10.Therefore, the movement of the touch printed circuit board 70_2 can besuppressed, and the flatness of the display device 100 can be improved.

On the other hand, on the connection area CNA, the second opticallytransparent adhesive member 40 does not overlap the second attachmentportion CB2 of the touch printed circuit board 70_2. The edge of thesecond optically transparent adhesive member 40 may be spaced apart fromthe end of the second attachment portion CB2 of the attached touchprinted circuit board 70_2. Thus, an attachment space of the secondattachment portion CB2 of the touch printed circuit board 70_2 can besecured.

FIG. 16 is a cross-sectional view of a display device according to stillanother embodiment.

Referring to FIG. 16, a display device 100_2 according to the presentembodiment is different from the embodiment of FIG. 2 in that a displaypanel 50_1 is flat without being bent.

For example, the driving unit DDR of the display panel 50_1 may extendoutward, and may maintain the same flatness as the display unit DAR. Asubstrate 51_1 of the display panel 50_1 may be a rigid substrate, suchas glass. However, the present disclosure is not limited thereto, andthe display panel 50_1 may be made of a flexible plastic material, suchas polyimide, and may maintain the flatness without being bent in thedriving unit DDR.

A driving chip 83 may be mounted on the driving unit DDR of the displaypanel 50_1. The mounting position of the driving chip 83 is located moreoutwardly than the edge of the second optically transparent adhesivemember 40. Further, the mounting position of the driving chip 83 may belocated more outwardly than the edge of the first optically transparentadhesive member 20 and the edge of the touch panel 30, although thepresent embodiment is not limited thereto.

A display printed circuit board 82 may be attached to the outside of thedriving chip 83. The display printed circuit board 82 may be attached toone surface of the display panel 50 via an anisotropic conductive film(ACF) or the like. One end of the display printed circuit board 82attached to the display panel 50_1 may be located more outwardly thannot only the edge of the second optically transparent adhesive member40, but also the edge of the first optically transparent adhesive member20 and the edge of the touch panel 30.

The display printed circuit board 82 may be a flexible printed circuitboard similarly to the touch printed circuit board 70. The displayprinted circuit board 82 may be bent to surround the edge of the displaypanel 50_1 from the outside, as shown in FIG. 16. The other end of thedisplay printed circuit board 82 may be electrically connected to themain circuit board 90. The touch printed circuit board 70 may be bent tosurround, or partially surround, the display printed circuit board 82from the outside.

Also in this embodiment, the edge of the first optically transparentadhesive member 20 protrudes convexly at the connection area CNA, whilethe edge of the second optically transparent adhesive member 40 isconcavely recessed at the connection area CNA, and the edge of the firstoptically transparent adhesive member 20 and the edge of the secondoptically transparent adhesive member 40 are aligned at thenon-connection area NCA between the connection areas CNA. A relativepositional relationship between the edge of the first opticallytransparent adhesive member 20 and the edge of the second opticallytransparent adhesive member 40 in a plan view includes repeatedprotrusions and alignments.

Therefore, because the second optically transparent adhesive member 40is relatively further protruded on the non-connection area NCA, thebonding force with the display panel 50_1 therebelow is increased in thenon-connection area NCA. Accordingly, the space suitable for theattachment process of the touch printed circuit board 70 can be ensuredwhile improving the flatness of the display device 100_2. It is alsopossible to reduce or prevent wrinkles or other deformation force frombeing transmitted toward the display panel 50_1 of the back surface ofthe attachment portion CB.

In concluding the detailed description, those skilled in the art willappreciate that many variations and modifications can be made to thepreferred embodiments without substantially departing from theprinciples of the present disclosure. Therefore, the disclosed preferredembodiments of the invention are used in a generic and descriptive senseonly and not for purposes of limitation.

What is claimed is:
 1. A display device comprising: a first panelcomprising a pad side area at one side of the first panel; a firstoptically transparent adhesive member on a first surface of the firstpanel; a printed circuit board comprising a first attachment portion anda second attachment portion attached to the first panel at the pad sidearea, the first attachment portion and the second attachment portionbeing spaced apart from each other; and a second optically transparentadhesive member on a second surface of the first panel, wherein the padside area includes: a first connection area at which the firstattachment portion of the printed circuit board is attached to the firstpanel, a second connection area at which the second attachment portionof the printed circuit board is attached to the first panel, and anon-connection area at which the printed circuit board is not attachedto the first panel, wherein the non-connection area is between the firstconnection area and the second connection area, wherein an outer edge ofthe first panel at the first connection area and an outer edge of thefirst panel at the second connection area protrude more outwardly thanan outer edge of the first panel at the nonconnection area, and whereinthe first optically transparent adhesive member comprises a first convexportion overlapping the first connection area, a second convex portionoverlapping the second connection area, and a concave portion betweenthe first and second convex portions, the first and second convexportions being convex in a plan view.
 2. The display device of claim 1,wherein the first optically transparent adhesive member overlaps thefirst attachment portion of the printed circuit board and the secondattachment portion of the printed circuit board.
 3. The display deviceof claim 2, wherein the second optically transparent adhesive memberdoes not overlap the first attachment portion of the printed circuitboard or the second attachment portion of the printed circuit board. 4.The display device of claim 3, wherein the first panel further comprisesa sensing area, and wherein the first optically transparent adhesivemember and the second optically transparent adhesive member overlap thesensing area of the first panel.
 5. The display device of claim 1,wherein a perimeter of the first panel fully surrounds a perimeter ofthe first optically transparent adhesive member in a plan view.
 6. Thedisplay device of claim 1, wherein a portion of a perimeter of the firstoptically transparent adhesive member protrudes more outwardly than aperimeter of the second optically transparent adhesive member in a planview.
 7. The display device of claim 1, wherein an occupied area of thefirst optically transparent adhesive member is larger than an occupiedarea of the second optically transparent adhesive member in a plan view.8. The display device of claim 1, wherein an edge of the first opticallytransparent adhesive member and an edge of the second opticallytransparent adhesive member are aligned to directly overlap each otherin a plan view at the non-connection area, and wherein the edge of thefirst optically transparent adhesive member protrudes more outwardlythan the edge of the second optically transparent adhesive member in aplan view at the first connection area and the second connection area.9. The display device of claim 1, further comprising: a window on thefirst optically transparent adhesive member; and a second panel on thesecond optically transparent adhesive member opposite the first panel.10. The display device of claim 9, wherein the first panel comprises atouch panel, and wherein the second panel comprises a display panel. 11.A display device comprising: a first panel comprising a first padportion, a second pad portion, and a portion between the first padportion and the second pad portion; a first adhesive on a first surfaceof the first panel; a printed circuit board comprising a first portionattached to the first pad portion and a second portion attached to thesecond pad portion, the first portion and the second portion beingspaced apart from each other; and a second adhesive on a second surfaceof the first panel, wherein the first pad portion and the second padportion are spaced apart from each other in a first direction, whereinthe first pad portion and the second pad portion protrude more outwardlythan the portion of the first panel in a second direction intersectingthe first direction, wherein an outer edge of the first panel at thefirst pad portion and an outer edge of the first panel at the second padportion protrude more outwardly than an outer edge of the first panelbetween the first and second pad portion, and wherein the first adhesivecomprises a first convex portion overlapping the first pad portion, asecond convex portion overlapping the second pad portion, and a concaveportion between the first and second convex portions, the first andsecond convex portions being convex in a plan view.
 12. The displaydevice of claim 11, wherein each of the first pad portion and the secondpad portion includes a plurality of pads, and wherein the portion of thefirst panel does not include any pad.
 13. The display device of claim11, wherein the first adhesive overlaps the first portion of the printedcircuit board and the second portion of the printed circuit board. 14.The display device of claim 13, wherein the second adhesive does notoverlap the first portion of the printed circuit board or the secondportion of the printed circuit board.
 15. The display device of claim14, wherein the first panel further comprises a sensing area, andwherein the first adhesive and the second adhesive overlap the sensingarea of the first panel.
 16. The display device of claim 11, wherein aperimeter of the first panel fully surrounds a perimeter of the firstadhesive in a plan view.
 17. The display device of claim 11, wherein aportion of a perimeter of the first adhesive protrudes more outwardlythan a perimeter of the second adhesive in a plan view.
 18. The displaydevice of claim 11, further comprising: a window on the first adhesive;and a second panel on the second adhesive opposite the first panel. 19.The display device of claim 18, wherein the first panel comprises atouch panel, and wherein the second panel comprises a display panel.